cant open books from file ?

They spell it differently - ADOBE - you called it Abode which is an easy mistake.

The file type is .pdf (portable document format) and most computer users use Adobe reader to view these sort of files.

Install a free copy of Adobe reader and your book files should open OK

http://get.adobe.com/reader/

Alternatively open them again in the format you want - Word - HTTP - etc.

There's so much pdf stuff on the internet you might as well get Adobe's reader now

http://en.wikipedia.org/wiki/Portable_Document_Format

Good luck...

Peccavi
December 2012